.main {
	background-color: #ffffff;
    .header {
        .paper-title {
            font-size: 56rpx;
        }
        .text {
            width: 500rpx;
			min-width: 267px;
        }
        .desc {
            font-size: 12px;
        }
        .difficulty {
            height: 42rpx;
            position: relative;
            line-height: 42rpx;
        }
    }
}